Journal or Book Title
Journal of Applied Physics
In this study, pure α-TmAlB4 (YCrB4structure)single crystals were grown with no β-TmAlB4 (ThMoB4structure) intergrowth, and zero magnetic fieldtransitions were confirmed through specific heat capacity, magnetization, and electric resistivity measurements. The anomalous magnetic transition was found at approximately 6.2 K with long range antiferromagnetictransition at 5.6 K. The difference in field dependence between these two transitions indicates that they do not share a common magnetic origin. In addition, we investigated electrical resistivity down to 20 mK, and found upturn behavior at around 0.8 K. The low temperature upturn anomaly in resistivity was not found for other compounds of investigation for RAlB4 (R=rare earth elements), which suggests that an α-RAlB4system has a significantly different ground state, compared to a β-RAlB4 system.
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American Institute of Physics
Sung, N. H.; Kreyssig, Andreas; Kim, H.; Tanatar, Makariy A.; Rhyee, J. S.; Kang, B. Y.; Kim, M. G.; Kim, J. Y.; Canfield, Paul C.; Prozorov, Ruslan; Goldman, Alan I.; and Cho, B. K., "Zero field magnetic phase transitions and anomalous low temperature upturn in resistivity of single crystalline α-TmAlB4" (2010). Ames Laboratory Publications. 209.